EP 0406872 A2 19910109 - Method for the preparation of a large-pored crystalline molecular sieve.
Title (en)
Method for the preparation of a large-pored crystalline molecular sieve.
Title (de)
Verfahren zur Herstellung eines weitporigen kristallinen Molekularsiebes.
Title (fr)
Procédé de préparation d'un tamis moléculaire cristallin à grands pores.
Publication
Application
Priority
DD 33056689 A 19890707
Abstract (en)
2.1 Molecular sieves which belong to the aluminosilicates of the zeolite type have long been known. They are distinguished by the fact that their structure consists of AlO2- and SiO2 tetrahedra whose sequence in the lattice leads to a characteristic pore structure. These and other properties give some of these solids outstanding properties in catalytic conversions and in material separation processes. However, the disadvantage of the molecular sieve types known to date is that their pore openings are between about 2.1 and 7.4 ANGSTROM and they are therefore incapable of adsorbing molecules having effective cross-sections which are greater than these pore sizes. It is intended to develop an economically and ecologically advantageous process for the production of an aluminophosphate molecular sieve or its Si- containing modification which has a defined structure and pore orifices and whose diameter is at least 0.8mm. 2.2 The process is characterised in that the gel-like reaction mixture or components thereof is or are cooled to temperatures below 20 DEG C for a period of 15 minutes to 24 hours before it is subjected to hydrothermal crystallisation in a pressure vessel. 2.3 Preferred use of the molecular sieve as a catalyst, as a catalyst component, as a selective adsorbent or as a sensor matrix.
Abstract (de)
Verfahren zur Herstellung eines kristallinen Alumophosphat-Molekularsiebs sowie seiner Si-haltigen Modifikation mit mikroporöser, definierter Raumnetzstruktur und Porenöffnungen, deren Durchmesser mind. 0,8 nm beträgt durch hydrothermale Kristallisation eines gelartigen Reaktionsgemischs, das aus mindestens einer Aluminiumverbindung, einer Phosphorverbindung, Wasser und einer strukturdirigierenden Verbindung besteht und zusätzlich eine Siliciumverbindung enthalten kann und das nach der Kristallisation eine Struktur besitzt, die sich im Röntgenbeugungsdiagramm (Cu-Kα-Strahlung) durch mindestens folgende Reflexe ausweist <IMAGE> wobei das fertige gelartige Reaktionsgemisch oder Komponenten davon auf die Dauer von 15 Minuten bis 24 Stunden auf Temperaturen unterhalb 20°C abgekühlt wird, bevor es in einem Druckgefäß der hydrothermalen Kristallisation unterworfen wird.
IPC 1-7
IPC 8 full level
B01J 29/84 (2006.01); C01B 37/04 (2006.01); C01B 37/08 (2006.01)
CPC (source: EP)
B01J 29/84 (2013.01); C01B 37/04 (2013.01); C01B 37/08 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0406872 A2 19910109; EP 0406872 A3 19920102; EP 0406872 B1 19950111; AT E116951 T1 19950115; DD 299288 A5 19920409; DE 59008225 D1 19950223; ES 2069633 T3 19950516
DOCDB simple family (application)
EP 90112879 A 19900705; AT 90112879 T 19900705; DD 33056689 A 19890707; DE 59008225 T 19900705; ES 90112879 T 19900705